Unauthorised Debit Resulting in Finance Charges!!!

Where do I start... I got an sms to say the debit would be going off on the 25th Feb - i contacted them to ask to please move it to the 29th (this is my normal debit order date) as that is when i will have funds in my acc. Was then told yes it will be done. Debit STILL went off on the 25th when i had no funds and i was then charged bank charges... Called in again and was told by Jabu (team leader in call center) that it will be sorted and he opened a case and everything ***. then I get contacted by accounts department only for them to tell me nothing is wrong with my account - I KNOW NOTHING IS WRONG!!!! but i am owed the funds for the finance charge as Cell C was in the WRONG by telling me the date would be moved as i did not have funds in my acc and made the effort to inform them... They F**kd up by still letting the debit go off! Your calls are recorded!!! check your records on the 24th Feb between 8-9am (in fact Jabu should have attached this call log to my case number) It's pathetic that you expect people to pay in time but you keep f***ing up and can do nothing for your customers in return!!!